mb/google/octopus: Add two new sku IDs for foob

Declare these sku IDs:
    -SKU: 1 Foob, 1-cam, no touch, no pen.
    -SKU: 9 Foob360, 2-cam, touch, pen.

BUG=b:145837644
BRANCH=octopus
TEST=emerge-octopus coreboot

Signed-off-by: tong.lin <tong.lin@bitland.corp-partner.google.com>
Change-Id: Iffcbb3f6f945ea299ff687a383a82b88dcd11ea1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37906
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marco Chen <marcochen@google.com>

src/mainboard/google/octopus/variants/foob/Makefile.inc

@@ -1,3 +1,3 @@
 bootblock-y += gpio.c
-
 ramstage-y += gpio.c
+ramstage-y += variant.c

src/mainboard/google/octopus/variants/foob/gpio.c

@@ -20,6 +20,8 @@
 #include <soc/gpio.h>
 #include <ec/google/chromeec/ec.h>
 
+#define SKU_UNKNOWN 0xFFFFFFFF
+
 static const struct pad_config default_override_table[] = {
 	PAD_NC(GPIO_52, UP_20K),
 	PAD_NC(GPIO_53, UP_20K),
@@ -37,8 +39,47 @@ static const struct pad_config default_override_table[] = {
 	PAD_NC(GPIO_214, DN_20K),
 };
 
+static const struct pad_config non_touchscreen_override_table[] = {
+       /* disable I2C7 SCL and SDA */
+	PAD_NC(GPIO_114, UP_20K),     /* LPSS_I2C7_SDA */
+	PAD_NC(GPIO_115, UP_20K),     /* LPSS_I2C7_SCL */
+
+	PAD_NC(GPIO_52, UP_20K),
+	PAD_NC(GPIO_53, UP_20K),
+	PAD_NC(GPIO_67, UP_20K),
+	PAD_NC(GPIO_117, UP_20K),
+	PAD_NC(GPIO_143, UP_20K),
+
+	/* EN_PP3300_TOUCHSCREEN */
+	PAD_NC(GPIO_146, UP_20K),
+
+	PAD_NC(GPIO_161, DN_20K),
+
+	PAD_NC(GPIO_213, DN_20K),
+	PAD_NC(GPIO_214, DN_20K),
+};
+
+bool no_touchscreen_sku(uint32_t sku_id)
+{
+	if (sku_id != 9)
+		return true;
+	else
+		return false;
+}
+
 const struct pad_config *variant_override_gpio_table(size_t *num)
 {
+	const struct pad_config *c;
+	uint32_t sku_id = SKU_UNKNOWN;
+
+	sku_id = get_board_sku();
+	if (no_touchscreen_sku(sku_id)) {
+		c = non_touchscreen_override_table;
+		*num = ARRAY_SIZE(non_touchscreen_override_table);
+	} else {
+		c = default_override_table;
 		*num = ARRAY_SIZE(default_override_table);
-	return default_override_table;
+	}
+
+	return c;
 }

src/mainboard/google/octopus/variants/foob/variant.c

@@ -0,0 +1,36 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <baseboard/variants.h>
+#include <soc/pci_devs.h>
+#include <ec/google/chromeec/ec.h>
+
+#define SKU_UNKNOWN     0xFFFFFFFF
+
+void variant_update_devtree(struct device *dev)
+{
+	uint32_t sku_id = SKU_UNKNOWN;
+	struct device *touchscreen_i2c_host;
+
+	touchscreen_i2c_host = pcidev_path_on_root(PCH_DEVFN_I2C7);
+
+	if (touchscreen_i2c_host == NULL)
+		return;
+
+	/* SKU ID 1 does not have a touchscreen device, hence disable it. */
+	sku_id = get_board_sku();
+	if (no_touchscreen_sku(sku_id))
+		touchscreen_i2c_host->enabled = 0;
+}